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- GPU & AI Servers
Atlas Immersion Platform
High-Density AI & HPC Performance

Up to 8 GPUs in a compact 3 OpenU platform, optimized for 21" high-density infrastructures and immersion-cooled data centers.
Powered by AMD EPYC™ 9005 series processors, the platform delivers high-performance compute for modern AI and HPC workloads.
Combined with next-generation GPUs and high-bandwidth interconnect technologies, it ensures efficient acceleration for demanding applications.
The system supports up to 8 dual-slot GPUs and NVIDIA® NVLink® technology, enabling fast GPU-to-GPU communication and scalable performance for AI training, inference, and scientific computing.

Accelerated by the latest NVIDIA GPU architectures
The Atlas platform is designed to support the latest generation of high-performance GPU accelerators for AI, HPC, and advanced computing workloads.
The system is fully compatible with leading NVIDIA architectures including NVIDIA RTX 6000 Pro and NVIDIA H200 NVLink4, while also supporting a broader range of GPU configurations depending on workload and deployment requirements.

NVIDIA H200 NVL4
- LLM
- Generative AI
- HPC simulation large scale training
NVIDIA RTX 6000 PRO
- AI development
- Computer vision
- Digital twin
- Visualization
- Inference
AI Cluster Ready Infrastructure

The Atlas platform is designed to deliver maximum compute density for modern AI clusters. By integrating up to 8 GPUs within a compact 3 OpenU chassis and a 21" wide architecture, the system enables higher rack utilization, improved space efficiency, and optimized energy performance.
This high-density design makes Atlas an ideal building block for large-scale AI training clusters, HPC environments, and enterprise accelerated computing platforms, allowing more compute power to be deployed per rack.
Combined with immersion cooling, the platform supports sustained high GPU power levels while maintaining reliable and efficient thermal performance.
Higher GPU density per rack
Deploy more GPUs within a smaller footprint to accelerate AI training infrastructure.
Optimized for single-phase immersion cooling
Immersion cooling enables sustained high-power GPU operation while improving overall infrastructure efficiency.
Cluster-ready architecture
Combined with 6 PCIe NIC slots for high-speed networking, the Atlantis enables efficient interconnection of multiple GPU nodes.
Designed for Immersion Cooling

The Atlas platform is purpose-built for single-phase immersion cooling, enabling stable operation under sustained high GPU power while simplifying infrastructure management.
To provide complete confidence for data center operators, 2CRSi supports immersion deployments with a dedicated manufacturer warranty, ensuring that the system remains protected when operated in qualified immersion environments.
Front I/O accessibility
All networking and system connections are accessible from the top of the server, simplifying installation and maintenance while avoiding complex cabling at the bottom of the immersion system.
Simplified maintenance
The server layout allows operators to quickly access compute nodes and networking components, reducing intervention time and improving serviceability.
Optimized for high-density deployments
The immersion-ready architecture allows higher compute density per rack while maintaining reliable thermal performance for GPU-intensive workloads.
| System | |
| Model | Atlas 1.8SP5-D 3OU |
| Form Factor | 21-inch 3OU |
| Dimension |
530.4mm x 804.43mm x 138.5mm (W x D x H) (useful/overall dimension) |
| Storage | |
Internal type | 1x M.2 (Gen3 x4 link, PCIe or SATA 6Gb/s); Form factor: 22110/2280 [CPU0] 1x M.2 (Gen3 x4 link, PCIe or SATA 6Gb/s); Form factor: 22110/2280 [CPU1] |
External type | See Table below |
Raid controler | Optional |
| Motherboard | |
| Chipset | System on chip |
| CPU |
Dual AMD EPYC™ 9005/9004 Turin, Genoa, Bergamo and Genoa-X with AMD 3D V-Cache™ Technology Series Processor families, up to 128-core, 256 threads per processor, cTDP up to 400W |
| Socket | Dual SP5 (LGA 6096) |
| Expansions slots (Internal) | 4x PCIe x16 (Gen5 x16 link), FH-FL DW [CPU0] 4x PCIe x16 (Gen5 x16 link), FH-FL DW [CPU1] For GPU TDP up to 600W (RTX PRO 6000 and H200 NVL4 supported) |
Expansions slots | See Table below |
| TPM | 1x TPM header with SPI interface for TPM 2.0 module (optional) |
| BMC | Aspeed AST2600 |
| Memory | |
| Total Slots | 24 DIMM slots (12-Channel per CPU, 12 DIMM per CPU) |
| Total Capacity | Up to 12TB, from 16GB to 512GB per module |
| Memory Type | AMD EPYC™ 9005: RDIMM Up to 6400 MT/s AMD EPYC™ 9004: RDIMM Up to 4800 MT/s |
| Network | |
| Onboard | 1x Realtek RTL8211E for dedicated management GLAN 2x 1GbE LAN ports (1 x Intel® i350-AM2), support NCSI function |
| I/O | |
| Front | 4x USB 3.2 Gen1 type A 1x DB15 (VGA) 2x RJ45 1x RJ45 Management port |
Switch/LED | 1x Power button with LED 1x System reset button 1x ID button with LED 1x HDD LED 1x Status LED |
| Management solution | |
| Software | Aspeed® AST2600 management controller |
| Remote Management | BMC Remote control based on Aspeed® AST2600 remote management controller (Power Control Configuration, Chassis Identify, Boot Option, iKVM, BMC Account Configuration) |
|
Power Supply | |
| Type | 2+1 Redundant 3200W CRPS PSUs 80 PLUS Titanium (96%) |
| Operating environement | |
| Operating temperature | 10°C ~ 40°C (50°F ~ 104°F) |
| Non-operating temperature | -40°C ~ 60°C (40° ~ 140°F) |
| Operative relative humidity | 95%, non-condensing at 35° C |
| SKUs | Front Storage | Front Expansion slots |
| BRB-A21-308-SP5D-U1102 | 2x 7/15mm NVMe (PCIe G5) 32Gbps hot-swappable bays [CPU0] 2x 7/15mm NVMe (PCIe G5) 32Gbps hot-swappable bays [CPU1] | 1x PCIe x16 (Gen5 x8 link), FH-HL [CPU0] 1x PCIe x16 (Gen5 x8 link), FH-HL [CPU1] |
BRB-A21-308-SP5D-U1107 | 2x 7/15mm NVMe (PCIe G5) 32Gbps hot-swappable bays [CPU0] | 1x PCIe x16 (Gen5 x16 link), FH-HL [CPU1] |
"Coming soon" BRB-A21-308-SP5D-U1166 | 4x E1.S NVMe (PCIe G5) 32Gbps hot-swappable bays [PLX CPU0] 4x E1.S NVMe (PCIe G5) 32Gbps hot-swappable bays [PLX CPU1] | 1x PCIe x16 (Gen5 x16 link), FH-HL [CPU0] 1x PCIe x16 (Gen5 x16 link), FH-HL [CPU1] 2x PCIe x16 (Gen5 x16 link), FH-HL [PLX CPU0] 2x PCIe x16 (Gen5 x16 link), FH-HL [PLX CPU1] |